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SOCKS4 Proxy Server

simple socks4-proxy in modern c++

Overview

SOCKS proxy is simple proxy server which implements well-known SOCKS4 protocol. It accept and multiplexes input and output streams in one thread. It supports half-closed TCP connections. Also default timeout on connection is one second.

    Client           Proxy           Server
      |                |               |
      | 1. Connect ->  |               |
      |                |               |
      |  1. Hello -->  |               |
      |                |               |
      |                | 1. Connect -> |
      |  <-- 1. Hello  |               |
      |                |               |
      |                |               |
      | 2. Data ->     |               |
      |                | 2. Data ->    |
      |                |               |
      |                |               |
      | 2. Fin ->      |               |
      |                | 2. Fin ->     |
      |                |               |
      |                | <- 2. Data    |
      | <- 2. Data     |               |
      |                |               |
      |                | <- 2. Fin     |
      | <- 2. Fin      |               |

Assembly

This implementation depends on Boost.System, Boost.Asio, Google Log and Google Tests. Make dependencoes are cmake, make and git. Google Test is included into project dependencies as git submodule. So, to get sources one should clone repo recursively.

    git clone --recursive https://github.com/daskol/socks-proxy.git

And then one could start building as follows.

    mkdir -p build/release
    cd build/release
    cmake ../.. -DCMAKE_BUILD_TYPE=Release
    make -j2

In order to install target binary to system path one should run following.

    make install